Extra initialization command is very important to connect internet. Get modem initialization command for TATA DOCOMO network.
Modem Initialization Command for TATA DOCOMO
AT+CGDCONT=1,"IP","TATA.DOCOMO.INTERNET"
Modem Initialization Command for TATA DOCOMO
AT+CGDCONT=1,"IP","TATA.DOCOMO.INTERNET"